var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var carRouter = require('./routes/car');
var studentsRouter = require('./routes/students');
var booksRouter = require('./routes/books');
var managersRouter = require('./routes/managers');
var dataListRouter = require('./routes/dataList')
var app = express();


// 跨域问题
app.all('*', function(req, res, next) {
  // 设置请求头
  res.header('Access-Control-Allow-Origin', '*'); 
  // 我们的请求方式有以下的种类
  res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE');
  // 设置相应头可以有以下的信息
  res.header('Access-Control-Allow-Headers', 'Content-Type,Content-Length, Authorization, Accept,X-Requested-With');
  // 放行
  next();
});


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/car',carRouter);
app.use('/students',studentsRouter);
app.use('/managers',managersRouter)
app.use('/books',booksRouter);
app.use('/dataList',dataListRouter)

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
